So what do you guys do? Since I got the car (July) I've kept it close to full. Does it really make a difference? I hear you should to prevent rust. Others say it doesn't matter. Plus winter is coming and I wonder if that makes a difference. Coming from a pos Hyundai and didn't really care but having a G I want to keep her running good for a long time.

 

Keeping gas tank full will prevent condensation build up which may cause fuel line to freeze in extreme cold weather. I lived in Upsate NY so can relate too cold weather.

Newer gas tanks are teflon/plastic lined so rust is not an issue.
It helps to keep fuel pump cooler by having tank filled.

When I lived in NY generally kept gas tank at least 1/2 full in winter because never knew if a snowstorm would prevent access to fuel.

 

Keep your fuel tank as full as possible. That is the cheapest and easiest thing you can do to minimize condensation in your fuel tank. Water vapor starts condensing on the top and sides of the tank's interior surface when humid air gets into your gas tank,

Some states like CA and NY also offer ethanol-blended fuels. Water won't mix with gasoline but alcohol, including ethanol, can absorb water in your gas tank. The alcohol helps carry the water into the engine where it is vaporized in the cylinders and then blown out the exhaust pipe.

 

these things only really come into play if you dont' drive a lot (storage level) and/or live in a FREEZING area...

if you car pumping gas every 2~3 weeks or so.. i wouldn't worry about a thing..

only reason i keep my gas above 1/2 mark in the winter is to give me some traction in snow.. (makes a BIG DIFFERENCE..) and yes i have winter tires.. but in a blizzard, every little bit counts..

everything up top is my opinion and are probably wrong..

 

When I grew up out east where it snowed, I used to carry around bags of sand in my trunk during the coldest winter months. Not only did it add weight, but it was handy to have if you ever became stuck.

 

I don't fill up every chance I get more or less, I just drive until I need gas haha.

Never heard of rust building up in the gas tank.

 

If anyting, running the tank low tends to suck up crud that may have deposited on the bottom.

 

I've heard that, but I don't know how much of it I truly believe. If you think about it, you drive your car around all the time where the gas could be sloshing around, mixing all that stuff up anyway.

 

Thanks for all the info guys.